Loss Per Share - Schedule of Potentially Dilutive Securities Excluded from the Diluted Loss Per Share Calculation (Details) - shares		6 Months Ended
		Apr. 30, 2018	Apr. 30, 2017
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Share-based compensation arrangement by share-based payment award, options, outstanding, number		327,890	214,383
Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number		4,300,000
Antidilutive securities excluded from computation of earnings per share, amount		29,138,703	10,516,990
Series C Warrants [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Class of warrant or right, number of securities called by warrants or rights		11,569,364
Series A Warrant [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Class of warrant or right, number of securities called by warrants or rights		7,680,000	7,680,000
NRG Warrant [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Class of warrant or right, number of securities called by warrants or rights			166,666
Unvested Restricted Stock Awards [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number		1,185,457	1,986,732
Series C Preferred Shares [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Convertible preferred stock, shares issued upon conversion	[1]	7,906,783	0
Series B Cumulative Preferred Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Convertible preferred stock, shares issued upon conversion		454,043	454,043
Series 1 Preferred Shares [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Convertible preferred stock, shares issued upon conversion		15,166	15,166

[1] The number of shares of common stock issuable upon conversion of the Series C Preferred Stock was calculated using the stated value outstanding on April 30, 2018 of $14.5 million (original stated value of $33.5 million less the stated value of conversions to date through April 30, 2018 totaling $19.0 million) divided by the conversion price of $1.84. The actual number of shares issued could vary depending on the actual market price of the Company’s common shares on the date of such conversions.